Old news is old, but if you're a total nerd like me, you might love this and have been missing out until now:
Long story, short... in April of last year, a group called Starkid Productions from the University of Michigan created a musical version of Harry Potter that is hilarious, cute, and entirely free on youtube and from their website.
They obviously have no rights to the characters or anything, so the entire production is on youtube for free (and you can download their music for free). They also recently (as in last week) released a sequel. Not quite as good as the original, but still hilarious. If you haven't seen it yet, I recommend checking it out! I find a lot of the songs catchy (favorites: Get Back to Hogwarts, Ginny, Granger Danger, and Coolest Girl), the puns are pretty good, and while the sound quality falters a bit in the youtube videos, you can get most of it. Enjoy!